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sir generally if an equation has two logarathimic variables with different bases how to solve it

example

log4 (x-10= log2 (x-3)

where 4 and 2 are bases

arunesh goswami , 15 Years ago
Grade 12
anser 1 Answers
vikas askiitian expert

loga b = logb/loga

 

log4(x-10) = log2(x-3)

log(x-4)/log4 = log(x-3)/log2

{ log4 = log22 = 2log2 }

log(x-4)/2log2 = log(x-3)/log2

log(x-4) = 2log(x-3) = log(x-3)2

x-4 = (x-3) 

x2 -7x + 13 = 0

now solve this & get x

 

approve if u like my ans

 

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Last Activity: 15 Years ago
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